Portable computer



FIG. 1 is a top, front, left side perspective view of a portable computer showing my new design;

FIG. 2 is a front elevational view thereof on an enlarged scale;

FIG. 3 is a right side elevational view thereof on an enlarged scale;

FIG. 4 is a top plan view thereof on an enlarged scale;

FIG. 5 is a rear elevational view thereof on an enlarged scale; and

FIG. 6 is a bottom plan view thereof on an enlarged scale. 

The ornamental design for a portable computer, as shown and described. 